Percussive tools

Details Percussive tools Percussive tools

1985-04-23

1986-04-15

Kazenske, E. R.

Tool driving or impacting

Drive controlled by relative axial movement of tool

Reciprocating drive member connected to pulsing fluid column

173116, 173117, 173119, 92 85B, B23B 4502

Patent

active

045821445

ABSTRACT:
Disclosed herein is a percussive tool having a piston and a ram slidably mounted within a cylinder which is axially displaceable. An air chamber is defined in front of the ram, and the cylinder has exhaust openings formed therein. With the cylinder in its retracted position, the exhaust openings communicate with the front air chamber so that the air cushion therein is vented during forward movement of the ram, and with the cylinder in its advanced position, the exhaust openings are closed to seal the air chamber so that the ram is limited in its rearward movements.

REFERENCES:
patent: 4290492 (1981-09-01), Sides et al.
patent: 4310055 (1982-01-01), Wanner et al.
patent: 4325436 (1982-04-01), Richter et al.

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